Tubular key casing



FIG. 1 is a perspective view of a tubular key casing showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof, the right side being a mirror image;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a second perspective view thereof; and,

FIG. 6 is an exploded view thereof showing an environment of use.

The broken lines illustrate the environment and form no part of the claimed design. 

CLAIM The ornamental design for a tubular key casing, as shown and described. 